RF filter calculator-Lowpass calculator,Bandpass calculator
This page of converters and calculators section covers RF filter calculator. This page on RF filter calculator covers RF lowpass filter calculator and RF bandpass filter calculator.
RF filter calculator-Lowpass filter type
Following is a simple LC based RF lowpass filter calculator of order N equal to 3.
Example of RF Filter Calculator of lowpass type:
INPUTS : Fc =1182.5 MHz, Z0 = 50 Ohm
OUTPUTS: L = 134 micro-henry, C = 5.38 pF
RF lowpass filter calculator equation
Following are the equations used in RF lowpass filter calculator of order N equal to 3. Figure-1 depicts lowpass filter pi and T section topologies. This simple RF filter calculator made of L and C components is very useful.
RF filter calculator-Bandpass filter type
Following is a simple LC based RF bandpass filter calculator of order N equal to 3.
Example of RF Filter Calculator of bandpass type:
INPUTS : f1 = 1024.5 MHz, f2 = 1060.5 MHz, Z01 = 50 Ohm
OUTPUTS: L1 = 44 µH , L2 = 13.19 nH , C1 = 527.6 pF , C2 = 17.7 nF
RF Bandpass filter calculator equation
Figure-2 depicts bandpass filter pi and T section topologies.
Following are the equations for above mentioned RF bandpass filter topologies.
L1 = [ Z0/ (Pi*(f2-f1)) ] ..... Henries
L2 = [ Z0*(f2-f1) / (4*Pi*f2*f1) ] ..... Henries
C1 = [ (f2-f1) / (4*Pi*f2*f1*Z0) ] ..... Farads
C2 = [ 1 / (Pi*Z0*(f2-f1) ] ..... Farads
Refer step by step RF filter design. It covers microstrip based RF/Microwave Low Pass Filter design example along with Kudora's identities, Richard transformation and filter coefficients table
for Chebysev LPF.